Feeding mechanism for wire-stitching machines.



H. WEBER. FEEDING MEGBANISM FOB. WIRESTITGHING-MAGHINES.

APPLICATION FILED OUT. 18, 1911. 1,078,024.

Patented Nov; 11,1913.

2 SHEETS-SHEET 1.

H. WEBER. FEEDING MECHANISM FOR WIRE STITGHING MAGHINES.

APPLICATION FILED OT. 18, 1911. 1,078,024, Patented Nov. 11, 1913.

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Ta all whom may ooneem:

Be it known that I, HENRY WEBER, a cit v zen. oi the United States, residing at Ch cage, county of Cools and-State at 1111- nois, have invented certain new and useful Improvements in- Feeding Mechanism for wirestitching: Machines, of which the following isa specification. 3

This: invention relates in general to.- wire stitching er staplingmachines, and mere particularly to the mechamsm forfeeding and cutting: the preparatory to the forming of the staple, and has for'oneofi its objectsto, provide an improyed machlne of this class,- having means for simultaneously adjusting the. feeding mechanism with the. cutter for regulating the length of the legs: ofthe staple. p

A further object to provide an 1mproved.- apparatus of this class which will be simple, durable and cheap in construction and effective and efiicient in; operation;

To. the attainment; of these. ends and the accomplishment-101i other new: and: usefiul ob, jects, as will appear,.the-myent1on consistsin the features; of novelty in substantially the construction, combination and arrange.-

ment. of: the several parts hereinafter more fully described and claimed and 1n; the accompanying drawings-,:.. illustrating an example of the invention, and inwhich- Figure l is a face new of the head oi a wire stitching machine embodyingithis vention; Fig; 2' is a: sectional viewon line 2-2, Eig.

pivot pin of the dog.

As isusual in machinesof tliaicharacter',

the wirefrom' which the s les areformedl is: supplied; from thetndmaqe reek and tion of; the intention, themire; guide is, showmiasea tube 8? whichiis armngedin the.

cutter-block 9 suitablysupported: on; a. frame- 10; and: 7 ring: onefecetlfi flllSh'QWlth ten 11 rents and: slides; against this; 12. and: is provided: with meansfim'secunng the same total shenk ltl, such!- asa scream 14,.wh1ch s ecmeauon ofll'ietters Patent. name we emwm, me man meta.

;sha.ft. To, rod 19 is provided with an anti-friction: "roller 21 for the engagement of'tlie cam 20, and ten fiicilitate and reduce the. cost of" manmiacture, the rod is: made cylindrical so gthat-itst socket iir which it is held and guided Imay be. formed: by a drill. This socket isfonmedl in a.- frame' 22,. or any other suitable: i'supportgrided adjacent the rod I9, havmg a. so

and so close thereto as to. constitute a 2continuatiom oi the socket of the rod 19. 'Iwhenebya: pin- Q41, which is secured to the: ,rod 19- mayprojectv into, the socket 23, and engagewith one endlotthe spring- 25 located. in the socket 23-1501? returning the rod 19- to its elevated position when released by the foam-20. 'Ehiepin. 24, by; projecting from one socket to the other, also constitutes means for holding the rod; 19 against rotation; passes through.- asuitable wire guide. 8 for 1'; Fig; 3 is a sectienaLview online 33-33, Fig. 1; Fig.- 4= is: asectional View on line Fig; 1; Fig. 5. is: a detail sec tional view of thewire gripping or feeding dogs; Fig.- 6. is a perspective, viewofthe- Patent'ed'Nov. 11, 1913.

passes through the cutter 11 andhas en go n'ient withthe shank 13'.- The sh 1 13 851188 within the cutter bloek 9 and is referalaly cylindrical. Ihe upper end 0 the shank is connected to means for recei motion from the-usual cam shaft: 15, or

1 some other moving part oi the machine. for

causing the cutter blade 11 to move. across the end; of the wire tube 8, and thereby severthe wire projecting therethmugli. For this purpose, the end of the shank is:

formed with two flan s 16-47, which, for convenience in manu acture, dncal turned up thereon or formed in any: suitable way!, and between which flanges may be cylimengages: a bar or arm 18 secured to the end:

on the rod-1 9, in. any suitablemanner; The upper end oi the rod 19- is arranged to be.

engaged at: the proper time by a cam 20 "secured to the cam shaft 15 or any other suitable moving'part. of the machine where by the-rod 19! be; depressed and the wire severed dun-i135 eachrewolution of thecamuce: firictinn, the end of the t 23 therein; parallel with therod.

When it is desired to removethecutt'en move; the Scnow" 26-1 which holds the cutter" block; 9 place in the frame 10, thereby allowingthe block to be. withdrawn in an upward direction away from the arm 18. the extremity of theguide tube8.'- The cut- "Elie eutterblock- 9 together with the; blade head 27, notwithstanding the connection ofthe shank 13 with the rod 19, because, as is readily seen, the flanges 1617 slide along such arm during this adjustment wlthout destroying the connection'between the shank 13 and the rod 19. This adjustment of the cutter-block and cutter-blade may be eflt'ected in the usual or any suitable way. In the exemplification of the invention shown in the drawings, the frame is attached to a slide 28 mounted for movement, in a slot 29 in the main frame member 30, and this slide is engaged by a threaded portion 31 of a rod 32 journaled in a support 33 on the frame member30 and held against the longitudinal movement with such journal 33. The rod is also provided with a handle 34 by means of which it may be rotated, and by the rotation of this knob or handle 34, the frame 10 will be adjusted with relation to the head 27 which houses the staple forming and driving devices.

. In order to advance the wire from which the staple is formed, to the stapling or stitching mechanism as Well as to the cutter blade 11, there is provided a feeding dog designated generally by the reference numeral 35 which is mounted upon a slide 36, and this slide 36 is mounted to reciprocate upon guides 37 on the frame 10. The dog 35 is provided with a serrated face 38 which coiiperates' with a support 39 for the wire, to grip the wire, and as the shde 1s moved by the oscillating arm 40, to wh ch it is secured by a pin and slot connection pivoted to fixed support 41, toward the head 27, the wire will be gripped and forced through the guide 10. T h1s arm 40 1s provided with an extension 42 at the end of which is j ournaled an anti-friction roller 43, whereby the arm 40 is rocked by a cam 44 connected to the cam shaft 15. As the shaft rotates, the cam 44 will engage the extremity of the arm 42 and rock the arm 40 .45 in a direction to move the slide 36 toward the head. This arm 40 is usuallyreturned by means of an elastic member coiled about the pivot 41. When the arm is returned after having been moved by the cam 44, the

. slide 36 will also'be returned to secure a new grip on the wire.

Inordcr to hold the wire against retro grade movement when the slide 36 is being returned, a retaining dog 45 is provided which coiiperates with a support 46 to grip.

the wire. This dog 45 is referably in the form of adisk having rate et teeth 47 with which a'spring pawl 48 coia'perates so as to permit the dog 45 to rotate in one directlon' 60, and to lock it against rotation in the opposite direction. I i

.In order to release the wire from the feed ing do when the latter reaches the limit of its eeding movement, there is provided a stop 49 having a threaded extremity 50 which engages in a proj eetin portion or arm 51 on a slide 52.' This sli e 52 is preferably arranged on the side of the main slot 29 in the frame 30 and also through a slot 53 in the frame 10, and is of sufiicient length, to project some distance beyond the front of the frame 10 so that the end of the stop 49 which is mounted in this arm or extension 51, will be disposed within the path of movement of an extension 54 on the dog 35. When the slide 36 is moved in a direction to feed the wire, the extension 54 on .the dog 35 will, engage. the extremity of the stop 49 and the latter will rock the dog to release the wire. This sto 49 is adjustably secured to its support so t at it may be adjusted to take up thewear on the extremity at the end of the stop, and a fastening device 55 is provided for securing the stop against accidental displacement with respect to the support 51.

In order to vary the time of the enga ement of the extremity 54 of the dog 35 Wlth the stop 50 to release the wire, and thereby regulate the amount of wire which is fed to the staple forming mechanism, the stop 49 is mounted upon the slide 52, and this slide has connection, with the rod 32 by means of a threaded portion 56 engaging the slide 52. This threaded portion 56 is opposed to the threadedportion 31, that is, the threads run in opposite direction so that when the rod 32 is rotated by the knob or handle 34, the slidesor supports 10-52 will be adjusted towardor away from each other according to the direction of rotation of the rod 32 as will be understood, and this adjustment will move the cutter-block 9 together with the cutter-blade 11 toward or away from the head 27, while at the same time the stop 49 will be adjusted with respect to the cutterblock 9 to position the sto 49 to be engaged by the extension 54 on t 1e dog 35 at different points in the line of travel or feed ing movement of the dog 35. This adjustment is provided for the pur ose of regulating or varying the length 0 the legs of the staple. If the slide .36 is allowed to travel the full length of the movement of the arm 40, before it is tri ped to release the wire, the staple legs will e of considerable length, but if the stop 49 is adjusted to trip the dog 35 before the slide reaches the limit of its travel or feeding movement, a less amount ofwire will be fed to the stapling mechanism and cutter and therefore the staple legs will be shorter.

The feeding dog 35 is pivotally mounted upon the slide 36 by means of a pivot pin 5 which preferably has a cylindrical body 58 having a flattened or shouldered portion 59. The pivot pin passes through an aper- .tion, the normal tendency of the elastic mem- 4; member 63 again into engagement with the an back to its normal position so that the memimam ture 60- in the dog -and has a'thmaded extremity 61 whichengages the slide 36s When thus secured to the side-36 the-dog 35 :is mounted for free pivotal movement about the pivot pin 57." Thedog is a passage 62 which extends 0 liquely fromv the aperture to the bearing iaceof the dog and a-contact member 63- is mounted in the upper end of the passage 62 to project into- R the aperture 66 so as to engage the periphery:- of a-pivot pin 57, and: an elastic member-64.- is mountedin the assage 62*whioh tendsnormally to force t e member-=63- into em; gagement with the ivot=pin.- Aremovable-j 15' plug 'isthreade "into thelowerend ofthe passage 62 and forms an abutmen-t 'forv one end of the same and also ameans where by the tension of the elastic member 64 rmayr be varied. 4 gin, When the'dog; 35 is in a gripping or in the position-shown in F1g.- 5,'the -member 63 will be in engagement with the shoulder or flattened portion 59 of the pivot pin, and when in, engagement with this por ber- 64 is to force the-dog38 in a direction to grip the wire and will hold it in this position as long as the member 63 engages the flattened or shouldered portion '59. The dog 30, will thus grip the wire during the movement of the slide 36 and will hold the wire until: the extremity 5401f the dogengagesthe extremity of the sto 49, which latter will rock the dog about its pivot pin 58 and will 35 move the member 63 out of'contactwith the flattened or shouldered portion 59 of the pivot pin into a'position so that it"will engage the roundedportion of-th'eperiphery. This movement of the dog will overcome the 4g tension or tendency of-the elastic member 64 to force the dog into a gripping-position, and will retain the dog in its inoperative position until the do ,is moved by'some other means than the e astie member-to force the flattened or shouldered portion 59. This last movement of the dog may be accomplished by means of another stop 67 "which isadjustably mounted in anyfixed portion of the 5m mechanism and extends within the path ofthe returning movement of the extension 54 of the dog35 to be engaged by-such extension before the slide 36 reaches the limit of its return movement. This will force the dog 35 ber 63'will engage the flattened or shoulder portion 59 of the pivot pin. It will thus bemanifest that the operation of the dog-3'5 to release the wire is controlled by the posi- 0-1 tion of the stop 49 which latter is positioned by the operation of the rod 32, and inasmuch as this rod also. has-connection with the cutter-block 9 for adjusting the same with re-' spect to the staple form1ng mechanism,-the e5 operation of this rod will simultaneously 'ad-' .ovided' with" velements' to-bein the just thestop 49=and the cutter-block 9 with respect. to each other, and also the cutterblock 9=with respect stitching mechanism. Fromthe foregoing description it will be seen. that the operation ofthe-mechanism described will be .as follows: Assuming the ositionshown in Fig. fland-the-shaft 15 to will engage the friction roller 43 of the arm 41 and will oscillate the same about its piv tal 41 will cause theslide 36 carrying the dog 3ii-"to -meve-toward the head 27 in which is @mountedjthe staple forming and stitching mechanislln. This movement of the slide point. 'Thismovement of the arm to. the. staple forming or rotating, the cam 44 Y will be'priorite any movement of the rod 19- and the-Ishank- 13 'carr ing the cutter blade Q11! andalso the staple g, imechanism :and consequently the wire engaged bylthe dogv35'will be fed and located under the staple forming and stitching mechanisnrpriorto. being severed, formed or orming and stitching driveni. Duringthismovement of the slide 36-the. spring 64 within the dog will force the member} 63 into engagement with the" flattened portion-59 of the pivot pin 57 and thus retainthe {bearing face of the dog in sueh-apositionthat the serrations 38 thereof will engage the wire and clamp the same between sa1 bearing face and the seat 39. When the slide 36 has fed sufficient wire through the cutter-block 9, depending on the adjustment ofthe stop 49, the projection 54 of the dog-will contact with said: stop 49 and swing said do about the pivot pin 57,thus causing the friction member 63 4 to bear {against the rounded surface of the pivot pin '57"duringthe retrograde movement of the slide, thereby retainingthe dog 35 in an elevated-position above the seat 39 to prevent the serrated face 38 thereof from contacting fwith the wire. At the end of the retrograde movement. of the slide the projection 54 will engage the stop 67 swinging the dog 35 about .thepivot pin to the positlon illustrated in Figs, 1 and, 5 wherev the serrated face 38 of the dog will clamp the wire against the seat 139; By rotating the handle.- 34, the shaft or rod 32 will rotate andthrough the instrumentality of. the oppositely disposed threads 31 and 456 will adjust the slides 28 and 52 Ito and fromone another. This movement of the slides28and 52 willsimultaneously adjust the cutter-block 9 and the cutter-blade 11 with respect to the head 27 to sever more or less wire asthe case may be, dependent on the direction of adjustment, and the stop 49 to'release the wire at the proper point in the operation just prior to the movement of-the cuttenblade 11.

What is claimed as new is: a

j 1. In-a machine for-the purpose described, the combination of a wire feed dog for gripping and feeding the wire, a pivot element about which the dog is movable, yielding means carried by the dog and frictionally engaging the pivot element and tending normally to move the dog into operating position to'grip the wire, said means also operating on the pivot to hold the dog in an inoperative position, means for moving the dog into an inoperative position, and

means for moving the dog into an operating position, and means for moving the dog into and out of engagement with the stops.

3; A gripping dog for wire stitching machines or the like embodying a wire support,

a dog cooperating therewith, a pivot element for the dog and about which the dog is movable, said element having a shouldered por-- tion, and elastic means carried by the .dog and cooperating with the said shouldered portion to normally move the dog to grip the wire, said elastic means also cooperatmg with another portion of the pivot element to hold the dog in an inoperative position.

4. A gripping dog for wire st tchlng machines or the like embodying a wire support, a dog cooperating therewith, a pivot element for the dog and about which the dog is movable, said element having a shouldered portion, and elastic means carried by the dog and cooperating with the said shouldered portion to normally move the dog to grip the wire, said elastic means also cooperating with another portion of the pivot element to yieldingly hold the dog in an inoperative position.

5. The combination with a wire feeding and gripping dog mounted for reciprocation, of a pivot therefor, a yielding friction element arranged to operate against said pivot and normally force said dog into a gripping position, said yielding friction element. likewise adapted to retain said dog in a non-gripping position, and means located at the terminals of the path of movement of said dog for placing the said dog in a grippin or non-gripping position as the case may e.

6. The combination with a wire gripping and feeding dog mounted for reciprocation, of a pivot therefor, a yieldable friction element mounted within the do arranged to engage the pivot aforesaid or normally moving the dog into a gripping position and also at predetermined intervals retaining the dog in a non-gripping position and stops arranged at the termmals of t e movement of said dog for placing t e same in a grippin or non-gripping position as the case may e.

7 The combination with a wire gripping and feeding dog mounted for reciprocation, of a pivot therefor, a yieldable friction element mounted within the dog arranged to engage the pivot aforesaid for normally moving the dog into a gripping position and also at predetermined intervals ret-ainin the dog in a non-gripping position, and ad ustable stops arranged at the terminals 0 the path of movement of said dog for placing the same in a grippin or non-grippmg position as the case may e.

8. The combination with a feeding dog adapted to alternately grip and releasea wire, of independent operating means for said dog whereby said gripping and said releasing action is created, and means whereby said independent operating means may be relatively adjusted.

9. The combination with a reciprocatory feeding dog for alternately gripping and releasing a wire, of stops at the terminals of the path of movement of said dog for cause ing said releasing and gripping action, and means for varying the distance between said stops thereby adjusting the point of grip and point of release of the wire.

10. The combination with a feeding dog adapted to alternately grip and release a wire, of independent means for controlling the automatic gripping and releasing of said wire, and means whereby the releasing point and gripping point may be relatively and simultaneously adjusted.

11. The combination with a feeding dog, of an adjustable gripping stop, an adjustable releasing stop, and means for relatively adjusting said stops with respect to each other.

12. The combination with afeeding dog adapted to alternately grip and release a wire, of a stop adapted to cause the release of said wire, said stop being adjustable, a releasing stop cooperating with said dog, and means for simultaneously adjusting said stops to or from one another. I

13. The combination with an alternately gripping and releasing dog, of a cutterblock, a stop independent of said block for controlling the point of release, and means for simultaneously adjusting said cutterblock and said stop.

ath of i 14. The combination with a dog, of a cutter-block, a stop cooperating with said dog, and means for simultaneously adjusting said cutter-block and stop to and from one another.

15. The combination with a frame, of a cutter-block carried thereby, a dog mounted for reciprocation thereon, a stop cooperating with said dog and said frame, and means for simultaneously adjusting said frame and said stop. v

16. The combination with a frame, of -acutter-block carried thereby, a dog mounted for reciprocation thereon, a slide, a stop carried by said slide, and cooperating with said dog and frame, and means for simultaneously adjusting said slide and said frame.

17. The combination with a frame, of a cutter-block carried thereby, a primary slide secured to said frame, a secondary slide arranged adjacent thereto, a stop carried by said secondary slide, and means cooperating with said slides for adjusting the same to and from one another.

18. The combination with a frame, of a cutter-block carried by said frame, a dogmounted for reciprocation of said frame, a

slide secured to said frame and adapted to move therewith, a second slide located adjacent to said frame, a stop carried by said second slide adapted to lie in the path of movement of said dog, and means for adjusting said slides to and from one another, thereby changing the relative positions of said stop and cutter-block 19. The combination with a frame, of a cutter-block carried by said frame, a dog mounted for reciprocation of said frame, a slide secured to said frame and adapted to move therewith, a second slide located adj acent to said frame, a stop carried by said second slide ada ted to he in the path of movement of sai dog, and a shaft piercin said slide and cooperating therewit through the instrumentality of oppositely; arranged threads. v

20. The combination with a support, of 40 a pivot pin carried thereby, a dog mounted for movement upon said pivot pin, and a frictional means carried by said dog adapt ed to retain the dog in adjusted positions.

21. The combination with a support, of a ivot pin carried thereby, a dog mounted or movement on said pivot pin, and means carried by said dog for engagement with the pivot pin to retain said dog in adjusted positions.

22. The combination with a support, having a seat formed thereon, of a pivot pin carried thereby, a dog mounted for movement on said pivot pin. for cooperation with said seat, and means carried by said dog for engagement with said pin to retain the former in adjusted positions with respect to said seat.

23. The combination with a support, of a pivot pin carried thereby having a flato tened face, a dog mounted for movement 11 on said pivot pin, and a spring-pressed v p unger for frictional engagement with theflattened and rounded surfaces of said pivot pin for retaining the said dog in adjusted position.

-In testimony whereof I have signed my name to this specification, in the resence of two subscribing witnesses, on' t is 16th day of October, A. D. 1911.

. HENRY WEBER.

Witnesses:

Omnms H. SEEM, Fmmcrs A. Horms. 

